[R-390] The adventure begins (and a capacitor question).

[John Saeger]

So my R-390a has arrived.  I know there are things that one should do before
turning it on.  I checked the fuses and replaced a bad one.  But then I cast
all caution to the wind and turned it on.  I'm not sure if it's completely
functional.  The line audio stuff doesn't seem to do anything, but it plays!
Sounds great through a Klipsch Heresy.  A vintage speaker that's too ugly
for my living room.  So the overpriced shipping may have worked out.

It's a little bit moody though.  Maybe a lazy capacitor or something like
that.  So I'm thinking the first thing to do is start replacing capacitors.
I'm guessing if it's electrolytic, tantalum, or paper, it wants to be
replaced.  But my question is, what's the best capacitor to replace the
paper capacitors with?  Polyester, polypropylene, ceramic or something else?
I get the idea that the *orange drop* is popular, but has anybody ever
thought of using ceramics to replace some of the paper ones?  Maybe they are
even more reliable than the orange drops.  You can get 0.01 uf in a 1000V
version, and you can even get 0.1uf in a 200V version.  So it may be
possible to replace all of the papers with ceramics.  But I don't know if
it's a good idea.  What do you guys think?

John